Bock cbtrsheb



July 22, 1930. Y w, J, HARR 1,771,118

ROCK CRUSHEB Filed June 6. 1928 5 Sheets-Sheet 1 INVENTOR.

U ATTORNEY.

July 22,1930; .W..J.HARR 1,111,118

ROCK CRUSHER Filed June 6, 1928 3 Sheets-Sheet. 3

,l 7 7 i E M 1 6 1 i V 7 i I Y W M f V INVENTOR.

X M l TED STATESPATENT OFFICE F Patented July 22, 1930 WILLIAM J. runs, or DENVER, COLORADO ROCK onusrmit Application flied June 6,

My invention relates to crushing, grinding or pulverizing machines and its principal object resides in providing a mechanism of simple, practical and highly efiicient construction, particularly adapted for. crushing, pulverizing, sizing or sliming rock, coal and other substances too numerous to mention. Y 3

Another object is to provide a crushing machine adapted for the separation ofvalues fromltheir gangue in the materiaLwhile it is being disintegrated. 1 v 'Another object of the invention is to provide a machine of the above described character, capableof crushing materials in either a wet or. a dry condition, it being a distinctive feature of the invention that the operating parts of'the machine can not gumflr'since gumbo and muck are washed away'in the operation.

Another object of the inventionresides in providing a crushing machine. that is perfectly balanced throughout the movement of its operating elements, a further object is to provide means for varying the crushing action by the use of a weighingelement that canberegulated to increase or decrease the pressure exerted by the crushing elements of the machine, upon the mater1alrunder treat.-

0 ment, and still furtherobjeots reside in details of construction and novel and advane tageous arangements and combinations of parts, as will fully appearin the course of the:

' mortars included in the construction, showing a modified form.

The machlne, as shown, comprises a base 5, and-two frames erected at opposite sides and the grinding blocks "may be detachable l 1928. Serial 1%. 283363.

thereof for the supportof two cooperating" crushing units. Each frame has four up rights 6 of angle-section, connected by hori zontally disposed sills 7 and the frame may be otherwise connected or braced in any deslred manner.

Each of the crushing units comprises a trough-shaped mortar 8 supported upon the sills of the respective frame by means of outwardly projecting flanges 9. The mortar has between parallel side-walls 14, a concaved bottom 10 preferablyforined in the arc of 'a circle, the interior surface o'fwhich may be reenforced by means of a correspondingly shaped wear plate 12 of shorter width. The

mortar has in the center'of its bottom,a sump and outlet 13 for the discharge of crushed material and'it has in one of its-sidewalls an overflow-outlet 15 throughwhich slimes, tailings and fine solids in suspensionare car'- ried off. 1

A feed device for each crushing unit consists of a hopper 16'and diverging spouts 17, the lower vertical portions of which are slidable betweenthe upright angle bars 6 of the respective supportingframe.

The spouts feed the material .to the mortar atthe ends thereof to pass into the spaces between, the crushing block and the concave surface of the mortar at opposite sides of the point of contact of the same, and the elevation of the outlets of the spouts may be varied in accordance with the natureof'the material.

under treatment.

The materialmay be fed into the hopper from a launder 18 and wateror other liquid may be added to the material through apipe .19. The grinding elements of the machine consists of blocks 20 loosely supported in the concaved mortars andhaving arcuate under surfaces 22 of smaller radius than the arcuate bottoms of the mortars, that permit of a rocking movement of the blocks about a cen-l tral point offcontact. V w

The blocks of the two grinding units may '95 be provided with wear-plates 21 and they are connected for simultanenous operationby means of angle bars his to be under stood thatthe wear plates ofboth the mortarsso that they can be renewed in case of wear or breakage.

Supported on the connecting-bars of the grinding blocks, between the two units, is an open box 24 that extends lengthwise in substantially parallel relation to the mortars in the plane of the rocking movement of the grinding element. The box is intended to carry the weight required in the crushing action of the blocks upon the material in the mortars. The weight may consist of rocks, stones, scrap-iron or other ponderous matter, and it can be varied at y 'ill by merely adding to the contents of the box or removing part thereof as may be desired. The box, furthermore, functions as a means for connecting the crushing element as an entirety with the operating mechanism of the apparatus. This mechanism consists of a cross-head 525 mounted for vertical reciprocation on upright standards 26 by means of sleeves 27. The crosshead is connected at an end of the weight box by means of pins 28, and it has a transverse slot 29 for its operative connection with the driving-element of the mechanism.

The pins 28 are fastened at an end of the box and project through apertures of the crosshead, of hour-glass form, that permit of a rocking motion of the box with relation to the crosshead.

The drive-shaft 30, carrying a pulley 31, is mounted for rotation in pedestals 32 on the base of the machine, and ithas at one end, a crank 33 the wrist 34 of which travels in thetransverse slot of the cross-head. The pulley of the shaft may be connected with any conveniently located source of power.

In the operation of the machine, the rotary movement of the shaft causes the crosshead to reciprocate in a vertical direction and the reciprocal motion of the crosshead produces an oscillatory or rocking motion of the crushing blocks in their respective mortars through the intermediary of the weight-box. The material fed through the spouts 17 into the mortars enters into the spaces between the concave bottom surfaces of the mortars and the convex bottoms of the respective grinding container be closed at its top and completely filled.

The material in the mortars as it is being commlnuted works in under the blocks into the sumps 13 while the water overflowing through the outlets 15 carries off the tailings. The matter collected in the sumps contains the values and the sumps may be closed by means of removable screw-caps 35 as shown in the drawings, or the matter discharged through the central outlets of the mortars may be conveyed to any other receptacle through conduits connected with the outlets.

The mortars may be supplied with mercury for the purpose of amalgamation for the extraction of the metals from the material, or the bottom surfaces of the mortars beneath the crushing-members may be grooved as indicated at 36 in Figure 2, to catch and retain the fines.

It will be apparent that the weight on the crushing element is uniform under all conditions and that the operating parts of the machine are evenly balanced at each point of the operative movement.

A modified construction of the mortar has been illustrated in Figure 4. The bottom of the mortar is perforated at 38, and a spout 37 beneath the perforated portion of the bottom guides the material passing through the apertures into a subjacent receptacle.

The modified form is particularly useful in sizing the material pulverized in the operation of the machine.

Having thus described my invention what I claim and desire to secure by Letters Patent is:

1. In a crushing machine, mortars, rocking crushing means in the mortars, bars supported by and extending between the crushing means, a weight box supported on the bars between the crushing means, and operating mechanism acting upon the weight box to rock the crushing means.

2. In a crushing machine, mortars, rocking crushing means in the mortars, bars between the crushing means, a weight box on the bars, and mechanism to effect a vertical reciprocating motion to the weight box, and thereby rock the crushing means.

In testimony whereof I have afiixed my signature.

WILLIAM J. HARE. 

